https://devzone.nordicsemi.com/f/nordic-q-a/38900/nrf528323-low-power-modesHi Everyone, I&#39;m having some trouble understanding the different combinations of low power modes and how to use them. When I first power up my board I use about 500uA and after a certain action I draw 3.5mA forever. I wish to return to this 500uAen-USTelligent Community 13Thu, 04 Oct 2018 09:18:08 GMThttps://devzone.nordicsemi.com/thread/151608?ContentTypeID=1Thu, 04 Oct 2018 09:18:08 GMT137ad170-7792-4731-bb38-c0d22fbe4515:3577971c-3f0a-4b38-bb9c-705644649b46Marjeris Romero<p>Hi Charles!</p> <p>The usual problem is that the board is in DEBUG mode. You shoIuld turn off all debug logging before doing current measurements. If this does not solve your problem I will need some answers from you in order to help:</p> <ul> <li>How are you measuring the current consumption?</li> <li>Could you post some code showing how you put the device into low power mode?</li> <li>What do you mean by &quot;a certain action&quot;?</li> </ul> <p>And for more information about the power modes I would recommend to take a look at Section 18: POWER in the <a href="http://infocenter.nordicsemi.com/pdf/nRF52832_PS_v1.4.pdf#%5B%7B%22num%22%3A716%2C%22gen%22%3A0%7D%2C%7B%22name%22%3A%22XYZ%22%7D%2C56.692%2C752.879%2Cnull%5D">product specification</a>.</p> <p>Best Regards,</p> <p>Marjeris</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/151395?ContentTypeID=1Wed, 03 Oct 2018 11:21:41 GMT137ad170-7792-4731-bb38-c0d22fbe4515:6c0ec650-610d-4d34-a578-fa2a7c327571Turbo J<p>The debugger will put the MCU in a constant high power state around 3mA - this is required for the SWD interface to work correctly.</p> <p></p> <p>If you are not connected to a debugger/SWD&nbsp; and use the Cortex-M4F core (NRF52xxx), then you might be running into an&nbsp; <a href="https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v12.0.0/hardware_driver_fpu.html?cp=4_0_9_2_4" rel="noopener noreferrer" target="_blank">FPU exception. </a></p> <p>See also: <a href="https://devzone.nordicsemi.com/f/nordic-q-a/12433/fpu-divide-by-0-and-high-current-consumption">FPU divide by 0 Thread</a></p><div style="clear:both;"></div>